Fig. shows the circular motion of a particle. The radius of the circle, the period, sense of revolution and the initial position are indicated on the figure. The simple harmonic motion of the x-projection of the radius vector of the rotating particle P is
Options:
(a) `x(t)=Bsin((2pit)/(30))`.
(b) `x(t)=Bcos((pit)/(15))`.
(c) `x(t)=Bsin((pit)/(15)+pi/2)`
(d) `x(t)=Bcos((pit)/(15)+pi/2)`